This chapter is from the book

This chapter is from the book

RPM Memory Locations

The RPM card module has several memory locations that it uses to store and
manage software code, configuration information, and other information.

The RPM boot Flash is used to store a boot image. This boot image is used by
the RPM if a suitable IOS image is unavailable. When you install a new RPM, the
boot image is loaded, and you must configure the RPM to upload the IOS image
from the PXM1 hard drive.

Dynamic random-access memory (DRAM) on the RPM is used to run the IOS
software, and it stores a working copy of the configuration files. As soon as
the initial RPM configuration is done, the RPM uploads the IOS image into
DRAM.

Static random-access memory (SRAM) on the RPM is used for shared-memory
switching of packets. This memory is used when routing data packets from one
interface to another.

NOTE

Unlike many Cisco routers, the RPM does not support optional Flash cards.

The PXM1 has an IDE hard drive that the MGX switch uses to store firmware and
configuration files. The RPM also utilizes this drive for IOS image and
configuration storage. If you want to store the IOS image or RPM configuration
file on the PXM hard drive, you must do so manually from the RPM CLI.